Re: find the maxima in a function

*To*: mathgroup at smc.vnet.net*Subject*: [mg97084] Re: [mg97052] find the maxima in a function*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Thu, 5 Mar 2009 04:52:26 -0500 (EST)*Reply-to*: hanlonr at cox.net

f[x_] := 1/(8*(Pi*t)^(3/2))*Exp[(-(x^2 + y^2 + z^2)/4*t)] Reduce[f'[x] == 0, x] t!=0\[And]x\[LongEqual]0 Off[Solve::ifun] Solve[f'[x] == 0, x] {{x->0}} Bob Hanlon ---- Oliver <sch_oliver2000 at yahoo.de> wrote: ============= Hallo, how can one find the maxima by using mathematica for the following function: f[x_] := 1/(8*(Pi*t)^(3/2)) * Exp[(-(x^2 + y^2 + z^2)/4*t)] i mean, the first derivation equal Zero. Thanks in advance.. Oli.